title: Four new steroidal glycosides from Solanum torvum and their cytotoxic activities.
abstract: Two novel C-22 steroidal lactone saponins, namely solanolactosides A, B (1, 2) and two new spirostanol glycosides, namely torvosides M, N (3, 4) were isolated from ethanol extract of aerial parts of Solanum torvum. Their structures were characterized as solanolide 6-O-[alpha-l-rhamnopyranosyl-(1-->3)-O-beta-d-quinovopyranoside] (1), solanolide 6-O-[beta-d-xylopyranosyl-(1-->3)-O-beta-d-quinovopyranoside] (2), yamogenin 3-O-[beta-d-glucopyranosyl-(1-->6)-O-beta-d-glucopyranoside] (3) and neochlorogenin 3-O-[beta-d-glucopyranosyl-(1-->6)-O-beta-d-glucopyranoside] (4) on the basis of spectroscopic analysis. The cytotoxicities of the saponins (1-4) were evaluated in vitro against a panel of human cancer cell lines. Compounds 3 and 4 showed significant cytotoxic activity with the cell lines.
authors.affiliation: Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Jiangsu, Nanjing 210009, PR China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Lu
authors.forename: Jianguang
authors.initials: J
authors.lastname: Luo
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Huang
authors.forename: Lingyi
authors.initials: L
authors.lastname: Kong
mesh_terms: D045744:Cell Line, Tumor; D003603:Cytotoxins / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D007783:Lactones / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D032322:Solanum; D013256:Steroids / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D003603:Cytotoxins; D007783:Lactones; D012503:Saponins; D013256:Steroids